A/C wiring?

[87chevy.com]

Originally Posted by Custom 68

sorry guys just now saw this. on mine I just used the factory (the 1968 truck) green wire for the AC on. The painless harness does have a wire to hook up to this also but with it hooked up i never could tell it did anything. I thought maybe it woule "idle it up" or turn on the e-fans but didnt seem to do anything. I left it unhooked. My AC works just like the stock or factory did in 1968. I think the only thing really required is the compressor to see a 12 volt causing it to kick the clutch on.

That setup works BUT the ecu does not know the compressors on and the engine rpm will go down, hesitate and will not turn off if you decide to WOT .. Why painless dint spend 5 extra bucks and add the required relay and a few extra wires... Same reason toyota didn't use the brake pedal switch to deactivate the deadly throttle body or gas pedal problem... Answer: no body knows
clint
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